THE CATERPILLAR LAB BLOG

This week's Caterpillar of the Week, spicebush swallowtail (Papilio troilus), has an extra-special body part that some of you may have observed at our shows. It's a two-pronged structure called an osmeterium, which stays hidden under the caterpillar's skin until the c...

CATERPILLAR OF THE WEEK: A comical face hidden among the leaves, the spicebush swallowtail caterpillar, Papilio troilus, is one of the region's most striking and well-developed predator mimics.
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